Medium ruled (or College ruled) paper has 9/32 in (7.1 mm) spacing between horizontal lines, with a vertical margin drawn about 1-1/4 in (31.75 mm) from the left-hand edge of the page. Its use is very common in the United States.
This comes to about 33 lines.
Frequently used rules:
- 5 × 5, or “small squares”
- Horizontal and vertical lines every 5 mm.
- General use. With or without margin according to the variants.
- “Big tiles”
- Fine horizontal lines every 2 mm, horizontal and vertical lines every 8 mm.
- Typical school notebook in France. This lineage always seems to be accompanied by a margin on the left.
- Created in 1892 by Jean-Alexandre Seyès, bookseller and paper-maker in Pontoise.
- An A4 sheet has 21 full tiles on one line and 29 full tiles on one column, making a total of 609 full tiles.
- Millimeter
- Millimeter semi-logarithmic
- Logarithmic Millimeter
- Horizontal and vertical lines: fine every 1 mm, average every 5 mm, thick every 10 mm. In the case of logarithmic rulings, only one or both axes are graduated along a nonlinear progression scale.
- Technical drawing, graphics. No margin or otherwise a margin of 10 mm all around the sheet.
- Simple lineage
- Horizontal lines every 10 mm.
- Classic letter paper. No margin.
- 7 mm double line
- Groups of two horizontal lines.
- Often used for learning to write in very young children.
- Double line 3 mm
- Groups of two horizontal lines.
- Often used for learning writing in young children.
- Music paper
- Groups of five lines.
- Accounting journal
- Horizontal lines every 10 mm, vertical lines to separate columns (designation, credit, flow) and numbers.